阅读理解：

　　简短回答问题

　　47. lighter and more absorbent
　　48. the potential in the U.S.
　　49. established athletic footwear industry
　　50. informally
　　51. The team spirit and shared values of the athletes

　　仔细阅读

　　52. B. By its sustainability
　　53. D. the decrease of brodiversity
　　54. C. They are not necessarily sustainable.
　　55. A. It will go through radical changes.
　　56. D. To urge people to rethink what sustainable agriculture is.

　　57. A. They were of inferior races.
　　58. B. They can do just as well as their predecessors.
　　59. D. They may forever remain poor and underachieving.
　　60. C. Prevent them from being marginalized.
　　61. B. how to help immigrants to better fit into American society

　　完型和翻译：

　　62 C results
　　63 A services
　　64 D from
　　65 C due
　　66 B owners
　　67 D grants
　　68 C unique
　　69 B permission
　　70 A except
　　71 C original
　　72 D distribute
　　73 B length
　　74 A plus
　　75 C distinguish
　　76 B but
　　77 A identical
　　78 C popularity
　　79 D Upon
　　80 B renewed
　　81 A long

　　82 He designed the first suspension bridge, which combined beauty and function perfectly.（把完美与功能完美地结合起来）

　　83 It was very dark, but Mary seemed to know which way to take by instinct.（本能地知道该走哪条路）

　　84 I don't think it advisable that parents deprive their children of freedom （剥夺孩子们的自由）to spend their spare time as they wish.

　　85 Older adults who have a high level of daily activities have more energy and a lower death rate compared with those who don't. （与不那么活跃的人相比死亡率要低）

　　86 Your resume should attract a would-be boss's attention by demonstrating why you are the best candidate for a certain position. （为什么你是某个职位的最佳人选）